
#include "mq_channel.hpp"


namespace chenmq
{
    class Connection
    {
    public:
        using ptr = std::shared_ptr<Connection>; 
        Connection(const VirtualHost::ptr& host, const ConsumerManager::ptr& cmp, 
                   const ProtobufCodecPtr &codec, const muduo::net::TcpConnectionPtr& conn, 
                   const threadpool::ptr& pool)
                   :_conn(conn), _codec(codec), _cmp(cmp), _host(host), _pool(pool), _channels(std::make_shared<ChannelManager>())
        {}

        ~Connection(){}

        //打开信道
        void openChannel(const openChannelRequestPtr& req)
        {
            bool ret = _channels->openChannel(req->cid(), _host, _cmp, _codec, _conn, _pool);
            if(ret == false)
            {
                DLOG("创建信道, 信道id重复");
                return basicResponse(false, req->rid(), req->cid());
            }
            DLOG("%s 信道创建成功! ", req->cid().c_str());
            return basicResponse(true, req->rid(), req->cid());
        }

        void closeChannel(const closeChannelRequestPtr& req)
        {
            _channels->closeChannel(req->cid());
            return basicResponse(true, req->rid(), req->cid());
        }

        Channel::ptr getChannel(const std::string& cid)
        {
            return _channels->getChannel(cid);
        }

        

    private:
        void basicResponse(bool ok, const std::string& rid, const std::string& cid)
        {
            basicCommonResponse resp;
            resp.set_rid(rid); 
            resp.set_cid(cid);
            resp.set_ok(ok);
            _codec->send(_conn, resp);
        }
        
    private:
        Consumer::ptr _consumer; //消费者对象
        muduo::net::TcpConnectionPtr _conn;  //muduo库的链接
        ProtobufCodecPtr _codec; //协议分发器
        VirtualHost::ptr _host; //虚拟机句柄
        ConsumerManager::ptr _cmp; //消费者管理句柄
        threadpool::ptr _pool; //线程池对象
    };


    class ConnectionManager
    {
    public:
        using ptr = std::shared_ptr<ConnectionManager>;
        ConnectionManager(){}

        void newConnection(const VirtualHost::ptr& host, const ConsumerManager::ptr& cmp,
                    const ProtobufCodecPtr& codec, const muduo::net::TcpConnectionPtr& conn,
                    const threadpool::ptr& pool)
        {
            std::unique_lock<std::mutex> lock(_mutex);
            auto it = _conns.find(conn);
            if(it != _conns.end())
            {
                return;
            }

            Connection::ptr self_conn = std::make_shared<Connection>(host, cmp, codec, conn, pool);
            _conns.insert(std::make_pair(conn, self_conn));
        }

        void delConnection(const muduo::net::TcpConnectionPtr& conn)
        {
            std::unique_lock<std::mutex> lock(_mutex);
            _conns.erase(conn);
        }

        Connection::ptr getConnection(const muduo::net::TcpConnectionPtr& conn)
        {
            std::unique_lock<std::mutex> lock(_mutex);
            auto it = _conns.find(conn);
            if (it == _conns.end()) 
            {
                return Connection::ptr();
            }
            return it->second;
        }
    private:
        std::mutex _mutex;
        std::unordered_map<muduo::net::TcpConnectionPtr, Connection::ptr> _conns;
    };
}